Replace aspell check with typos

This works on all files instead of just the Markdown files, and already found many issues aspell missed.

Author: linkmauve

.github/workflows/main-checks.yml

@@ -18,9 +18,7 @@ jobs:
  steps:
  - uses: actions/checkout@v4
  - name: Check spelling
- run: |
- sudo apt-get install aspell
- ci/spellcheck.sh list
+ uses: crate-ci/typos@v1.39.2
 
  doc_tests:
  name: Documentation Tests